Fixed # of rows for Multiline Textbox

[redaccess]

I want to give users a fixed # of rows to enter their information in a multiline textbox so I'm trying to determine if there's a way to prevent them from entering information beyond the 10 rows that I have showing by default. I realize I can limit the # of characters they can enter by using javascript but that can't stop them from using more than 10 rows.

Let me know if you have any ideas.

Thanks!